From: Vivek Goyal <vgoyal@redhat.com>
To: device-mapper development <dm-devel@redhat.com>
Cc: Mike Snitzer <msnitzer@redhat.com>,
Laurence Oberman <loberman@redhat.com>,
Tao Ma <boyu.mt@taobao.com>, Robin Dong <sanbai@alibaba-inc.com>,
Coly Li <colyli@gmail.com>, "Alasdair G. Kergon" <agk@redhat.com>
Subject: Re: [PATCH 3/4] dm stats: report histogram of latencies
Date: Tue, 16 Jun 2015 12:21:10 -0400 [thread overview]
Message-ID: <20150616162110.GA14943@redhat.com> (raw)
In-Reply-To: <alpine.LRH.2.02.1506091721430.1545@file01.intranet.prod.int.rdu2.redhat.com>
On Tue, Jun 09, 2015 at 05:22:05PM -0400, Mikulas Patocka wrote:
> This patch adds an option to dm statistics to collect and report the
> histogram of latencies.
>
> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
I am wondering how does histogram help. IOW, if disks are bad, will
average latencies not go up as well and that one can already calcualte
using existing stats.
Thanks
Vivek
next prev parent reply other threads:[~2015-06-16 16:21 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 21:20 [PATCH 0/4] Integrate dm-latency functionality to dm-statistics Mikulas Patocka
2015-06-09 21:21 ` [PATCH 1/4] dm-statistics: better argument validation Mikulas Patocka
2015-06-09 21:21 ` [PATCH 2/4] dm stats: support precise timestamps Mikulas Patocka
2015-06-10 17:10 ` Mike Snitzer
2015-06-10 17:33 ` Mikulas Patocka
2015-06-10 17:40 ` Mike Snitzer
2015-06-13 17:03 ` Coly Li
2015-06-15 13:04 ` Mikulas Patocka
2015-06-15 14:17 ` Coly Li
2015-06-16 15:33 ` Vivek Goyal
2015-06-16 19:27 ` Mikulas Patocka
2015-06-17 1:43 ` Vivek Goyal
2015-06-17 13:17 ` Mikulas Patocka
2015-06-17 13:20 ` Vivek Goyal
2015-06-17 15:18 ` Bryn M. Reeves
2015-06-17 14:54 ` Bryn M. Reeves
2015-06-17 14:52 ` Bryn M. Reeves
2015-07-27 15:11 ` Bryn M. Reeves
2015-06-09 21:22 ` [PATCH 3/4] dm stats: report histogram of latencies Mikulas Patocka
2015-06-13 17:03 ` Coly Li
2015-06-15 13:06 ` Mikulas Patocka
2015-06-15 14:41 ` Coly Li
2015-06-15 15:34 ` Mikulas Patocka
2015-06-16 16:21 ` Vivek Goyal [this message]
2015-06-09 21:22 ` [PATCH 4/4] dm stats: support statistics on requests-based devices Mikulas Patocka
2015-06-09 21:23 ` Laurence Oberman
2015-06-13 17:02 ` [PATCH 0/4] Integrate dm-latency functionality to dm-statistics Coly Li
2015-06-15 12:47 ` Mikulas Patocka
2015-06-15 14:35 ` Coly Li
2015-06-17 13:22 ` Mikulas Patocka
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